Film registering mechanism



Jan. 2, 1945. A. w. TONDREAU FILM REGISTERING MECHANISM Filed Feb. 17, 1945 6 Sheets-Sheet l J/Vi ENTO/Q.

A Tram/Ex Jan. 2, 1945. A W TONDREAU 2,366,578

FILM REGISTERING MECHANISM Filed Feb. 17, 1945 6 Sheets-Sheet 2 v 148 q 5-: .Zkvavroe.

r ALE/5E7 WJ/VDEEAU;

Jan. 2, 1945. w TONDREAU 2,366,578

FILM REGISTERING MECHANISM Filed Feb. 17, 1943 6 Sheets-Sheet 5 fA/vE/vroe.

* ALBEET WYZA DEEAU,

, .A TTOP/VEV- Jan. 2, 1945. A. w. TONDREAU 2,366,578

FILM REGISTERING MECHANISM Filed Feb. 17, 1943 6 Sheets-Sheet 4 2 2 fA/VE/VTOE. a 08 w- 1 g 1445527- W75N025A44 Jan. 2, 1945. A. w. TONDREAU FILM REGISTERING MECHANISM Filed Feb. 17, 1943 6 Sheets-Sheet 5 a W m T A Jan. 2, 1945.

A. w. TONDREAU FILM REGISTERING MECHANISM Filed Feb. 17, 1943 6 Sheets-Sheet 6 INVENTOR.

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' ATTO N EY.

Patented Jan. 2, 1945 2,366,578 v FILM REGISTERING MECHANISM Albert W. Tondreau, Hollywood, Calif., assignor to Warner Bros. Pictures, Inc., New York, N. Y., a corporation of Delaware Application February 17, 1943, Serial No. 476,181

3 Claims.

The present invention relates to a film registering mechanism particularly useful for a camera for color photography, or for other situations where a single film or a bipack is to be used.

An object of the invention is to improve as well as facilitate assembling, adjusting and repairing the working parts of the film registering mechanism.

Another object is to improve the drive for the film registering mechanism.

For further details of the invention reference may be made to the drawings wherein;

Fig. 1 is a vertical sectional view of a camera embodying the film registering mechanism of this invention.

Fig. 2 is an end view of the shutter illustrating its flange in section.

Fig. 3 is an enlarged transverse sectional view taken on line 3-3 of Fig. 1.

Fig. 4 is a detailed sectional view of the telescoping drive connection between the shiftable camera and the power supply.

Fig. 5 is an enlarged transverse view taken on line 5--5 of Fig. 1.

Fig. 6 is an enlarged fragmentary detailed sectional view of the film movement means, the optical system and their associated parts.

Fig. 7 is an enlarged detailed sectional view taken on line 'l--'! of Fig. 6.

Fig. 8 is a detailed sectional view taken on line 88 of Fig. 6.

Fig. 9 is an enlarged detailed sectional view taken on line 9-9 of Fig. 8.

Fig. 10 is a diagrammatic view illustrating the drive means in full lines and the camera outline in dot and dash lines, looking in the direction in flicated by line I 0--l0 on Fig. 3.

Fig. 11 is an enlarged sectional view of Orthochromatic film and Fig. 12 is an enlarged sectional view of the Panchromatic film.

Fig. 13 is a front view in elevation of the camera but with a modified door having a bulge to accommodate the film loop.

Referring in detail to the drawings, particularly Figs. 1, 5 and 6, the camera comprises a housing I for housing the means for traversing two films l9 and through the housing I and across the exposure apertures 49 and 49a served by the obj ective lens L.

The housing I is a box-like shell divided into two compartments 4 and 5 by a midrib 6. The compartment 4 houses the'film handling means generally indicated at 2 and including the feed sprockets l3 and I4, common sprocket 40, film movements 66 and 56a and take-up sprockets 89 v and I00. The compartment 5 houses the drive means generally indicated at 3, for the aforesaid sprockets and film movements. Two doors I and 8. close the opposite sides of the housing I and provide access to the compartments 4 and 5 respectively. The door 1 is hinged at 1' and covers substantially the entire one side of the housing I. The peripheral edge of the door I conforms to the contour of the housing i and is provided with cooperating stepped shoulders 8 t maintain a light seal therewith. The door 8 covers substantially the entire other side of the housing I, except for the well I83 (Fig. 5) and is secured thereto by suitable screws l0.

The midrib 6 is a plate-like member arranged vertically in the housing I in a plane parallel to the main optical axis A of the camera and oifset relative thereto. The midrib 6 is secured to an inwardly projecting flange II formed integral with the walls of the housing I (see Figs. 1, 3 and 5). The midrib 6 is removably secured to the flange II by suitable screws l2 spaced around its periphery. The midrib 6 carries or supports the film handling means 2 on one side thereof, and the drive means 3 for the same on its other side, and is readily secured to and removable from the housing as a unit through opening door 1, for easein assembling, adjusting and repairing the working parts of the camera.

The film handling means 2 includes a pair of continuously driven feed sprockets I 3 and H (see Fig. 5) secured side by side to a common shaft 1 I 5. The shaft 15 is mounted for rotation by a pair of anti friction bearings l6 arranged in a boss I! on the midrib 6 and is rotated by the drive 3 as will be later described. The feed sprockets l3 and I4 feed the film into the camera from a film supply magazine 18 which contains two reels of film l9 and 20. The film I9 is preferably a Panchromatic film substantially equally sensitive to all colors while the film 20 is an Orthochromatic film, more sensitive to blue than other colors. The magazine I8 containing the films l9 and 20 is mounted on top of the housing I adjacent its rear edge. The magazine i 8 has an eccentrically located mounting boss 2| (Figs. 1 and 5) on its under side which cooperates with a raised seat 22 on the upper wall of the housing I. The film supply magazine I8 is removably secured to the housing by a flange 23 which extends around the seat 22 and closely receives the boss 2|, a rib 24 on the forward lower edge of the boss 2! cooperating with a groove 25 in the forward wall portion of the flange 23. A clamp screw 26 threaded through a downwardly and forwardly inclined opening in the rear portion of the flange 23 engages in a notch 21 in the rear side of boss 2 I, to removably secure the magazine to the housing I.

The films I9 and 26 coming from the magazine I8 are kept taut by a conventional friction brake (not shown) and are passed down between a pair of rollers 29 and 36 in the opening 3| of the magazine I8,

The films I9 and 26 continue downward through a registering opening 3Ia in the upper wall of the housing I and then past a pair of guide rollers 32 and 33 mounted on a stub shaft 2I6 projecting from midrib 6. The films I9 and 26 are then trained around the feed, sprockets I3 and I4. Suitable retractable rollers 34 and 35 on arm 36 retain the films I9 and .26 in engagement with the sprockets l3 and I4 and the rollers 34 and 35 are held in engagement with the films by a cam latch 31. The films I9 and 26 upon leaving the sprockets I3 and I4 move forwardly inthe'housing I. The film IS, the outermost film is given a back loop 36 (see Fig. l) to side Step the film I9 to bring film I9 into the same plane as the film 26 and'they are then trained over a common continuously driven sprocket 46 with the emulsion of film I9 in contact with the emulsion of the film 26. Thefilms I9 and 26 are retained on sprocket 46 by suitable retractable rollers 4I.

The sprocket 46 is secured to a shaft 42 rotatably carried by a pair of anti-friction bearings 43 '(see'Fig. 3) mounted in a boss 44 on the midrib 6. The shaft 42 projects through the midrib 6 and into the compartment to be rotated by the drive means 3 to be later described;

The films I9, 26 leaving the common sprocket 46 in face to face relation, form a bi-pack and are trained down through a guideway slot 45 formed between aperture plate 46 and the back plate 41; The upper portion of the slot-45 is curved while the lower portion is straight and normal to the main axis A of the optical system. The aperture plate 46 forms a part of the front wall of the housing and its front side is flush therewith and its aperture 49 occurs at the traight portion of the slotinline with the main axis A ,of the optical system.

The aperture plate 46 issecured to a movement mounting plate 56by screws 5| and52,

and plate 52 in turn is secured to the midrib 6 by l screws 53. The front line of the plate 56. as it appears in Fig- 6 is the same as the frontline of aperture plates. 46 and 46a, both of which are thefront line or surface of the front wall 2. Theback plate 4'! is arranged closelyadjacent to the plate 46, allowing just enoughspace for the thickness of films I9 and 26 ,witha suitable clearance. The back plate 41 is secured to the mounting plate 56 by screws 54 passing through a flange 55 formed on the back inneredge of the plate 41. Screws 54 are threaded into the movement mounting plate 56.

As indicated in Figs, 11 and 12, the Orthochroma-tic film 26 has an emulsion X which is highly sensitive to blue forrecording a blue sensation record whenexposed at the aperture 49 and also has a red dye Y over the emulsion X which acts as a red filter for the bi-pack, thus.

recording a red sensation record simultaneously on the Panchromatic film I9. The Panchromatic film I9 has an emulsion Z that is sensitive to all colors.

The films I9, 26 in bi-pack relationare intermittently advanced through the slot45 to expose preferred to advance the films I9, 26 as a bipack, a distance of two picture frame areas at a time leaving every other picture frame area unexposed for a purpose to be later described.

I provide an improved film movement means 56 for advancing the films l9 and 26 as a bi-pack, and a similar means 56a for advancing only a single film I9. As shown particularly in Fig. 6, the film movement 56 comprises film engaging claws or ins 51 formed on the outer end of an arm 58. The arm 56 is a double ended lever pivoted intermediate its ends on a crank pin 59 formed eccentrically on a shaft 66. As shown in Fig. 7, th shaft 66 is rotatably mounted in a bearing support266 secured to the movement mounting plate 56 by screws 66b. The shaft 66 is continuously rotated by the drive means 3, and particularly by gear I65 shown also in Fig. 10. Similarly shaft 66a is driven by gear I63. As further shown in Fig. 7 the bearing support 266 is in the form of anlopen ended tube, the rightend of which houses bearing 233 and the left end of which fits in aperture234 in plate 56 and projects beyond the front of plate 56 where it is provided with screw threads 226 engaging with a screw-threadedcap 22I which retains the,

bearing sleeve 222 and in fact the whole assembly on shaft 66 in position in the support 266. The shaft 66 is journaledln abearlng 223 in the sleeve 222, both of the latterprojecting to opposite sides of plate 56. The bearing support266 has a flange 224' which is secured to the rear side of plate 56 by the screws 66b, while plate i has an aperture 225 which is larger than the flange washer 226 having apertures. for a lubricant bears certain areas thereof at the aperture 49. It is against the right side of,washer 226. Shaft 66 has a shoulder 229 and the washer 236 fitsit and bears against washer 226, and in turn gear I bears to the left against washer 236. Gear I65, washers 226, 226 and 236, sleevev222, bearing 224 and through which the bearing support 256' 223 and washer 236areretained under coin-' pression against the eccentrictLbymeans of a nut 23I on the screw-threaded portion v232 of ;the reduced section 366 of shaft 66,. all of these parts forming the shaft assembly. The bearing support 266 at its outer right end termlnatesdn a bearing 233 for the further .reducedright end 466 of the shaft 66. After removing the register pindrive element 88, 89 and. from' the right end. of shaft 66, and-afterunscrewing. the cap 221, the shaft 66.,and its assembly. may be withdrawn, to the left from thetubul'ar bearing support 266,,while leaving the,latter.secured-t0 plate 56. w Q t The pull-down mechanisms;56 and 56a may .be separated from the drive sprockets. I3 and.

by separating plate 50 fromlplate. 6. Thereis.

no mechanical connection between the pull-down mechanisms 56,and.5'6a and their respective register, pin mechanisms. at the front of plate.56. There is no meansat the fronttofuplataio. for holding the bearing support '266. the're to. .The pull-down mechanism 56 may be removedreadily from its register. pin mechanism .in'a simple manner by removing the screw 86. .Henoeit will be seen that the pull-down mechanisms. 56 and 56a and. their component partsareeaoh readily accessible. as .a unitjfor ease. in assembling,

adiustingand repairinglthe working parts.

The crank pin 59 works in an elongated slot GI in the arm 58 and is provided with a hardened wear taking block 62. A retaining washer 63 is attached to the end of the pin 59 by a screw 64 to hold the block 62 and the arm 58 against displacement from the shaft 60. Washer 235 fits between arm 58 and block 62 at the front thereof, and ring 66 and eccentric 61 at the back thereof. Ring 66 and eccentric 61 fitagainst washer 236 which bears on the end of bearing sleeve 222 and bearing 223. The inner end of the arm 58 is pivotally connected at 65 to an oscillating ring 66. The ring 66 surrounds an eccentric 61 formed on the shaft 60. The axis of the eccentric 61 is diametrically opposite the axis of the crank pin 59 to give the desired motion to the arm 58. The ring 66 has an anchor 68 diametrically opposite its pivotal connection 65 with the arm 58. The anchor 68 prevents rotation of the ring 66 and gives it an oscillating motion. The anchor 68 comprises a block 69 pivoted on a pin in the mounting flange 55 of the back plate 41. A rod 1I projects from the ring 66 and is slidably received in an opening 12 in the block 69. The anchor 68 thus provides a rocking slide bearing for rod 1I.

As the shaft 58 rotates, the crank pin 59 in being diametrically apposite the eccentric 61, gives the arm 56 a smoother action with much less sawing of its pins 51 in the perforations of the film. The crank pin 59 with the aid of the oscillating ring 66 gives the arm 58 the desired swing motion while the oscillating ring 66 alone produces the reciprocation of the arm 58 and the reciprocation of the arm occurs while the crank pin 59 is dwelling, thus-allowing the pins 51 to move into and out of the film perforations while the film remains still.

Suitable pilot pins 13 are employed in conjunction with the movement means 56 to hold the film in register with the aperture 49 while the exposure is taking place and the arm 58 is being retracted and returned to the successive film engaging positio ready to advance the next portion of film. The pilot pins 13 are guided for reciprocation in openings 14 in a boss 15 projecting from the mounting flange 55 of the back plate 41. The pins 13 engage in perforations at opposite sides of the films I9, and their inner ends are connected by a plate 16. The plate 16 is connected to a push rod 11 which is slidably received in an opening 18 in a bearing block 19 attached to the movement mounting plate 50. The push rod 11 has a cam notch 86 formed in a thickened portion 8| (see Figs. 6 and 8) and a cam 82 operating in the notch 80 reciprocates the rod 11 and its pins 13.

The cam 82 is formed on. the end of a shaft 83 which is mounted for oscillation in a sleeve bearing 84. The shaft 83 is eocentrically located in the sleeve .84 for purpose to be later described. The sleeve bearing 84 is carried in a tubular boss 85 secured to the movement mounting plate by screws 86. A suitable connection 81 is provided between the shaft and the shaft 83 The connection 81 is located behind the midrib 6 in the compartment 5. Connection 81 com. prises a connecting rod 90 pivotally connected at its upper end as shown in Fig. '1 to a crank pin 88 secured to the inner end of shaft 60, connecting rod 90 being pivotally connected at its lower end as shown at the top of Fig. 8 to a crank pin 89 secured to the shaft 83. The radius of eccentricity of crank pin 89 is greater than that of crank pin 88 as indicated in Fig. 6.

" side of the film 20 (see Fig. 6).

Rotation of shaft 60 causes reciprocation of connecting rod to oscillate shaft 83 and cam 82, to reciprocate the pilot pins 13. The operation of the pilot pins 13 is so timed that they remain in engagement with the perforations in the films from the time the feeding pins 51 start to leave the perforations until they again are engaged in the perforations.

The Orthochromatic film 20 upon leaving the aperture 49 is directed towards the rear of the housing I while the Panchro'matic film I9 is given a back loop 9I to sidestep the rearwardly moving film 28 and is given another back loop 92 to bring it back into line again on the other The Panchromatic film I9 continues forward, with its emulsion side up, to traverse a second aperture 49a where the unexposed areas are successively subjected to a reflected beam of light. A prism P is provided in the optical system to split the light into a direct beam and a reflected beam. Prism P is arranged between the lens L of the optical system and the apertures 49, 49a, as will later more fully be described. The reflected light is passed through a plus green filter carried by the aperture plate 46a, to make a green sensation record on. the film I9 between the alternate red records already on it. The aperture plate 46a is similar to aperture plate 46, but reversed in position and at right angles thereto. The film I9 is trained through a guide slot 45a between the aperture plate 46a and a back plate 41a similar to plate 41. The axis of the diverted beam of light is substantially normal to the main axis A of the optical system.

The film I9 is intermittently advanced through the guide slot 45a in synchronism with the advancement of film bi-pack I 9, 28 through guide slot 45. Film movement means 56a similar to the above described means 56, advances the film I9 and includes claws 51a on arm 58a for engaging the film I9. Arm 58a slidably receives crank pin 59a and is pivotally connected at 65a to oscillating ring 66a. The ring 66a is mounted on eccentric 61a formed on shaft 66a which also carries crank pin 59a and isanchored at 68a. The operation of the film movement means 56a is substantially the same as the movement means 56 described above.

The claw 51 works in a notch 41 in the back plate 41 and in a notch 46 in the front plate 46. Also the claw 51a works in a notch 41a in the back plate 41a, and in a notch 45a, in the front plate 46a. The length of travel of the claws 51 and 51a is substantially that of the length of the notches above described, as illustrated in Fig. 6. The shafts 60 and 66a, rotate in a clockwise direction which causes the claws.

51 and 51a to sweep in a counter-clockwise direc tion, whereby the film I9 and 20 move downwardly past the aperture 49, the film I9 moving from right to left across the aperture 49a. The claws 51 and 51a move the films l9 and 29 two picture frames at a time, with the result that film 20 has only alternate frame areas exposed, while film I9 has all picture frame areas exposed, the exposure of film I9 at aperture 49 being in the even numbered frames and at aperture 49a in the odd numbered frames or vice versa.

Pilot pins 13a and their associated operating parts for the movement means 56a are identical with the aforedescribed pilot pins 13 for the movement means 56 so the same numeral will appear on the drawings.

Upon leaving the guide slot 45a, suitable guides back towards the rearwardly moving film 20. The two films; I9 and 20 are brought together and trained in superposed relation acrossthe underside of th commonsprocket 40 and held in cooperation therewith by retractablerollers. 98. The films I9 and 20 then movedownwardly and rearwardly to laterally spaced take-up sprockets 99 and I and heldtherewith by retractable rollers 99a and I00a (see Figs. 1 and The film I9 after leavingthe common sprocket 40 is given a back loop ml to sidestep the film- 20 and bring film I9 into line-with its sprocket;- 99. The sprockets 99 and.I00 are fixedon shaft I02 mounted for rotation-by spaced antifriction. bearings I03 in a boss I04 on midrib B. The shaft I02 projects into the compartment 5 to be driven by the drive means 3 to belaterdescribed.

The films I9 and 20 upon leaving the take-up sprockets 99, I00 pass over guide rollers I05 ,(Fig.

1) out through opening I06 in the rear wall of the housing I'to be wound up in the take-up magazine I01 on reels I0-Ia. The drive for reels I01a will be later described. The construction of the magazine I01 and its means cfattachment is identical with that of the supply magazine I8 described so as to be interchangeable therewith.

A shutter H0 is mounted ina housing I II for rotation ona shaft IIOa between the apertures 49, 49a and prism P. The housing I I I is mounted stationary relatively to the main-camera housing I and the camera base I20, as will be subsequently described. The shutter II0 is a disclike body with an arcuate slot I I2 (Fig. 6) which. extends substantially 110 and registers with theaperture 49. An axially extending flange II3 projects forwardly from and at right anglesto.

the body H0 and passes between .the prism? and the aperture 49a and has a slot II4 which registers with the aperture 49a. The slot I I4 is v of same extent as the slot II2 and registers with the aperture 49a in synchronism with the slot II2 registering with its aperture 49. The housmg I I I has an opening I I la which registers with aperture 49 and an aperture I I Ib which registers with aperture 49a. The housing II I has its back wall close to the aperture plate .and its lower wall close tothe aperture plate 40a with :slight clearance. The forward end of the housing :I II is closed by a cover plate IIES; Thecover plate I I5 carries the lens L and the prismP of the optical system. The prism P is mounted in a'suitable holder I I0 secured in an opening H1 in the cover plate i I5 and the lens holder I I8 is threaded into a tubular boss II9'on the front of the cover II5.

The camera housing I is mounted on a base I20 (Figs. 1 and and is provided with guide ways I'ii and I22 at its front and rear edges respectively to allow for transverse-movement of the camera with respect to thebase I20. The shifting of the camera moves the axis of the view finder I23 into optical alignment with the main axis of the optical system. The viewfinder I23 is mounted onthe door 1 (see Fig. 3) and includes a lens tube I24 having the usual ground glassthe lower end of the bracket I4I.

96.-and'-91-direct the film I9-in a U shaped path;

To provide for. laterally. shiftingiithe camera; spaced racks I25: and I21 are attached to. the undersideof the-housing adjacent the front and rear guidewaysI2I and I22 (see Fig. 1). Gears 2 I20 and I29 engage the racks I26 and I21, respectively, and are fixed on acommon shaft I30 Journaled in the base I20: The shaft I30 projects upon the rear end of the base I20 and a manual operating-handle I3I isfixed thereto. Suitable positioning means (not shown) maybe provided to locate the camera in its two positions. The base I20 isprovidedwith a threaded boss- I32 exposed at its underside for receiving :the holddown screw of the usual tripod mount (not:

shown), while the major portion of its lower side is covered by a plate I33.

The drive means 3-for the camera diagram matically-illustrated in Fig. 10, comprises amotor M clamped in a cradle I35 byaband I35 secured to cradle I35 by screws 2I3. Cradle I35 is mounted ona shelf I31 of the base I20 (see Fig. 3). The motor shaft I38 is connected with a shaft I39 through a suitable friction clutch indicated at I40. The outer end of shaft I39 is journaled in a bearing 2I4 fixed in the lower end of a bracket I4I. Bracket I4I supports the shutter housing III and it may be formed integral with the cradle I35 (see Figs. 3 and 4). The shaft I39 has a spiral gear I42 incased in The drive for the shutter llfl'includes a shaft I43 housed in a tubular bearing tube I44 formed on the back side ofthe bracket I4I.' Shaft I43 has a spiral gear I45 at its'lowe'r end which meshes with the gear I42, and a spiral gear I46 at its upper end which meshes with a mating gear I41 on the shutter shaft I I0a.

The drive between the motor M and the drive means 3in the housing I comprises a telescopic connection I48 (see Fig. 4) which permits the lateral shifting of the camera for view finding. The telescopic connection I48 comprises a shaft I49 mounted for rotation on spaced antifriction bearings I50 carried by the bracket MI. The

shaft I49 has a spiral ear I5I that meshes with the motor driven gear I42 on one end and a splined socket I52 in its other. projects from the housing I through an opening I54'in the door 8. The shaft I53 is carried by spaced antifriciton bearings I55 mounted in a boss I56 on the midrib 6. Shaft I53 has splines I51 formed in its projecting end portion for cooperating with the splined socket I52 of shaft I49 and carries a spiral gear I58. The ear I50 is located between the spaced bearings I55 and meshes with a mating gear I59 fixed on a shaft I00. The shaft I60 is carried by spaced bearings IGI on the midrib 6 and is disposed at a 45 angle, being pitched upwardly and rearwardly ad'- jacent the side of the midrib 6.

The driven shaft I60 drives the two film movements 55 and 550. A spiral gear I62 fixed on the lower end of the shaft I60 meshes with a mating gear I69 on the shaft 60a of the film movement means 5 0a'and a similar gear I64 located above gear I59meshes with a gear I65on the shaft 69 of the film movement means 55.

The driven shaft I drives a second angularly disposed shaft I66 arranged at right angles to the shaft I 50 but in a laterallyspaced plane relative thereto. The shaft IIiBis pitched downwardly and rearwardly andis driven by a pair. of spiral, gears I61 and I68 fixed to the upper ends of the shafts I60- and .IBIi respectively. Theshaft I90 is connected to the shaft 42 of the com- A stub shaft I53 by the shaft I66. 1 the same vertical plane as the shaft I60 and parmon sprocket 40, to drive the same, by a pair of spiral gears I69 and I fixed on the shafts I66 and 42, respectively. The lower take-up sprockets 99, I00 are also driven by the shaft I66, and a pair of spiral gears HI and I12 fixed to the ends of the shaft I66 and the shaft I02, respectively, connect the take-up sprockets 99, I 00 for rotation.

A third angularly disposed shaft I13 is driven The shaft I13 is arranged in allel therewith to have its axis normal to the axis of the shaft I66. A pair of spiral gears I14 and I15 are fixed to the shafts I66 and I13, respectively. The shaft I13 is connected to the shaft I5 of the feed sprockets I3 and I4 by a pair of spiral gears I98 and I99 fixed to the shafts I13 and I5, respectively.

The shaft I13 forms a part of the drive for the take-up reels I61a and comprises a spiral gear' I16 fixed to the shaft I13 and meshing with a mating gear I11 on a shaft I18. The shaft I18 is rotatably carried by spaced bearings I19, I19a (see Fig. 5) mounted in a boss I80 en the midrib 6. The gear I 11 is arranged on the shaft I18 between the bearings I19, I190. and a pulley I8I is removably secured by screw I8Ia to the outer end of the shaft I 18 which projects through the side wall of housing I. A depression I83 formed in the side of the housing I adjacent its rear edge receives the pulley I8I and the door 8 is notched at I84 to leave the pulley uncovered and readily accessible. A similar pulley I85 is connected to the shaft of the take-up reels I01a and a suitable belt I86 connects the two pulleys I8I and I85 for rotation.

The usual friction drive (not shown) is provided in the shaft for the' take-up reels I0'Ia so as to properly take-up the films I9 and regardless of the peripheral speeds required. The friction drive in the take-up magazine I01 becomes the friction brake in the supply magazine I8 when used for the same, and vice versa as is common practice.

Counters I 81 and I88 are provided to register the amount of film wound up on the reels I01a and also the amount used for each scene and are mounted on the back wall of the housing I. A pair of miter gears I89 and I99 at each counter I81 and I88, respectively, are connected together by a common shaft I9I. The shaft I9I intermediate its ends, has a spiral gear I92 fixed thereto and a meshing gear I93 is secured on the outer end of a shaft I94. The shaft I94 is mounted for rotation in a boss I95 on the rear wall of the housing I and carries a spiral gear I96 on its inner end. The gear I96 meshes with a mating gear I 91 on the end of the shaft I5 of the feed sprockets I3, I4 adjacent the gear I98 (see Fig. 5).

Referring to Fig. 6 it will be seen that the L shaped aperture plates 46 and 46a merge with and fit in the angular front wall 2I I of the camera along side of the movement mounting plate 50. The aperture plates 46 and 45a have a light seal lit with wall 2 by means of cooperating stepp d shoulders 2| 2 and 2| 3. The shoulders or light seals 2| 2 and 2I3 extend straight out at right angles to the plane of Fig. 6 until they meet door 1, as shown in Fig. 3, and the ends of these shoulders 2I2 and 2I3 are light sealed by the inside of door 1. This is also shown in Fig. 13 where the outer ends of shoulders 2I2 and 2| 3 are light sealed by door 2I5. The door 2I5 may have a bulge 2I6 to provide more space for loop 9|, 92.

By opening door 1 and removing screws I2 which hold the plate 6 to the flange II, and by removing screw I8Ia and pulley I 8|, plate 6, with the film handling means 2, (including movement mounting plate 50 and aperture plates 46 and 46a) and with the film driving means 3 mounted thereon, may be removed as a unit through the opening of door 1, the telescopic connection I48 permitting shaft I53 to be removed from socket I52. Hence the film handling means 2 and the film drive 3 which form a unit with the plate 6, may be readily removed for inspection, adjustment, and repair.

The withdrawal of the pilot pins I3, 13a for threading the films I9 and 20 through the film movement means 56 and 56a is accomplished in a like manner and the description of threading the films I9, 20 through means 56 is as follows. The camera is stopped where its claws or pins 51 are retracted from the perforations in the films as illustrated in the drawings. The pilot pins 13 may then be retracted by turning the sleeve 84 (see Figs. 6, 8 and 9) which carries the eccentrically located cam shaft 83, all of which was described above. Turning of the sleeve 84 results in bodily shifting of the shaft 83 and the retraction of the pilot pins 13, by the cooperation of the cam 82 in cam slot of push rod 11 which in turn is connected with the pilot pins 13. The sleeve 84 has an operating arm 200 which is accessible in compartment 4 of the housing I. The arm 200 lies adjacent the movement mounting plate 50 and has a releasable latch 20I (Fig. 9) for holding the arm in either its normal position or its retracted position. The latch 20I comprises a retractable plunger 202 which is guided for movement in a tubular sleeve 203 attached to the outer end of the arm 200. The plunger 202 has an enlargement 204 slidably received in a socket 205 in the sleeve 203. The enlargement 204 is located on the plunger a slight distance from its inner end to leave a nose 208 which is selectively engaged in one of its two spaced locating openings 201. in the plate 50. A spring 208 surrounds the plunger 202 and is arranged between the bottom of the socket 205 and the enlargement 204 to releasably hold the arm 200 in its set position. The latch 20] may include an arcuate guide 209 for the end of the arm which relieves the arm of any outward thrusts.

The pull-down means 5611 being in the same timed relation with pull-down 56 will also have its feed pins 51a retracted, and to retract its pilot pins 13a, one merely swings the arm 200a around after releasing latch 20Ia. The film may then be readily threaded through the pull-downs 56 and 56a after which the arms 200 and 200a may be returned to their normal position and latched.

After the films I9 and 20 have been exposed in the camera above described, they may be suitably developed, and then release prints may be prepared in any suitable manner. Some methods of preparing release prints are disclosed in the co pending application S. N. 440,797, filed April 28, 1942 by Byron C. Haskin for Color photography, which application also discloses and claims the generic aspects of the method and means for color photography disclosed in the present application. This case is a continuation of S. N. 440,796, filed April 28, 1942, for Camera for color photography. The camera disclosed herein is claimed in my co-pending application S. N. 476,179, filed February 17, 1943, for Camera for color photography. The film movement mechanism disclosed herein is claimed in my copending application S. N. 476,180, filed February "1'7, 1943, for Film-movement mechanism.

Various modifications may be made in the invention without departing from the spirit of the following claims:

I claim:

1. Film operating means comprising a plate,'a rotatable shaft extending on opposite sides of said plate, a bearing fixed tosaid plate forsaid shaft, claw operating means'at one end of said shaft, a claw for said operating means on one side of said plate, a register pin rod on the same side of said plate, a crank pin on the other end of said shaft, a connecting rod for saidpin, a'rocking-shaftextending throughsaid plate,'a bearing fixed to said plate for said rocking shaft,ra connection between saidirocking shaft and-said connecting rod,.and a connection between said rocking shaft-and said'register pin rod.

2. Film operating mechanism comprising a rod terminating in a register pin, a slide bearing for said rod, a cam on said rod, a rocking shaft having a cam cooperating with said first cam, s. ro-

tatable drive shaft, 9, connection between said drive shaft and said rocking shaft, a manually rotatable sleeve, and a bearing therefor, said sleeve having an eccentric bearing for said rock- 'ing shaft.

3. Film operating means comprising a plate having an aperture, a sleeve fixed in said aper- 

